Interstate 29 and 85th Street Interchange in Sioux Falls

SDDOT and City of Sioux Falls project staff will hold a public information meeting on Thursday, March 19, 2026, at 5 p.m. at Sioux Falls Lutheran School located at 6715 S Boe Ln. in Sioux Falls. The meeting will inform the public on the Interstate 29 and 85th Street Interchange construction project in Sioux Falls. The meeting will be informal, with one-on-one discussion with SDDOT and City of Sioux Falls staff, along with displays to discuss the proposed construction project and answer questions.

The project includes construction of a Diverging Diamond Interchange (DDI), structure development work, grading, concrete surfacing, curb and gutter, storm sewer, lighting, signals, permanent signing, and pavement marking.